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Ethical hackers are specialised Cyber Security experts who work for all organizations which have an internet presence and use extensive use of web technologies for Business . Ethical Hackers role is a proactive one as they prevent cyber- crimes and protect cyber space from intrusion. They ensure data security and protect computer systems from illegal hacking activities. Computer Hackers use their expertise in computing and knowledge of programming, web applications, operating systems, assembly language, internet security systems etc. to protect computer systems from illegal hackers.
It is a niche skill and has limited career opportunities. However, if you able to break into your first job then its is very high paying and respected job. Most of computer hackers have graduation degrees such as B.Tech CSE/IT, BCA-MCA, B.Sc CS. Most of the hackers are those who have excellent programming skills.
You can appear in professional certification examination to become a Certified Ethical Hacker (CEH) by appearing in examination conducted by ED-Council. Certification is achieved by taking the CEH examination after having either attended training at an Accredited Training Center (ATC) or completed through self-study. CEH is a skilled professional who understands and knows how to look for weaknesses and vulnerabilities in target systems and uses the same knowledge and tools as a malicious hacker, but in a lawful and legitimate manner to assess the security posture of a target system(s). The CEH credential certifies individuals in the specific network security discipline of Ethical Hacking from a vendor-neutral perspective.

You have many options in front of you if you want to pursue writing after high school. One of these options is a course in journalism which would mean you would have a license to practice journalism. You could also take up writing courses like creative writing from symbiosis or diploma in writing from IGNOU. You could also become a certified content writer and enter the industry with viable certifications.
Apart from all these options, you could also publish technical journals which are highly paid in the industry, however you require a great amount of expertise to write journals. You could start by writing blogs, articles to gain some practice and a foothold in the industry. You could start by writing for yourself, and graduate to writing as a professional.